Bobbin-clutching means for rotatable spindles.



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UNITED STATES PATENT OFFICE.

CHARLES E. NUTTING, or HOPEDALE, MASSACHUSETTS, Assrenon To nnArnncont-o RATION, or HOPEDALE, MASSACHUSETTS, A CORPORATION or MAINELV' 1IBOBIBIN-GLUTCHING MEANS ronRoTATABLn srrnnnns.

Specification of Letters Patent. Patented May 14, 1918.

Application filed October 31, 1917. Serial No. 199,469.

I To all whom it may concern:

v Be it known that I, CHARLES E. NUTTING, a citizen of the UnitedStates, residing at Hopedale, county of Worcester, State ofMassachusetts, have invented an Improvement in Bobbin-Clutching Meansfor Rotatable Spindles, of which the following description, inconnection with the accompanying drawing, is a specification, likecharacters on the drawing representing like parts.

This invention relates to bobbin driving means-for rotatable spindlesforspinning, twisting and similar apparatus of that type wherein arotatable bobbin rest and spindle is provided with a plurality ofconcentrically arranged centrifugally-acting bobbinclutching means forholding the yarn. carrier or bobbin securely in place upon the spindle.

Itis desirable in this type of spindle to provide means located betweenthe spindle and the bobbin-clutching members which shall be yieldinglyactuated vertically to effect in cooperation with the said members theequal and symmetrical expansion or outward movement thereof and also toprovideradially interengageable means on said spindle and on saidbobbin-clutching membersnear the upper ends of the bobbinclutchingmembers for the purpose of restricting the radial outward movement'ofthe upper end of the bobbin-clutching members when thespindle is runningbare. The means employed for thus'yieldingly radially expanding thebobbin-clutching 'members is usually a vertically actuated device suchas an upwardly spring pressed cam shaped ring engaging cam surfaces onthe interior of the bobbin-clutching members, and there is thereforealways a positive tendency to raise the bobbin-clutchingmembersvertically. The effect of this action is to bringthe bobbinclutchingmembers into vertical engagement with the means on the spindle forlimiting the radial movement of the'upper. ends of and yieldinglyactuated expanding means,

means carried by the bobbinfrest ndl gagingthe lower ends; of thebobbin-clutching members and acting therebyto prevent thebobbin-clutching members from having the. undesirable vertical; movementand thus preventing vertical engagement ofthe ra di allyinterengageable. ,means employed. to limit radial movement ofthebobbin-clutching members while at the same time-permit? ting therequired radial movement, of the bobbin-clutching member'se Morespecifically the invention prov-ides a construction: inwhichtheibobbinrest is provided with a vertical annular recess, in which thebobbin-clutching,members are provided with radially vprojecting feethaving an annular groove on the upper surface thereof, and in whichanexpansible ring is inserted in the recess in the bobbin rest andheldfin engagement therewith over the groove in the feet so as toprev'entthe vertical movement i of the bobbin-clutching memberswhilepermitting :the required. radialmovement thereof. v

These and other features of the invention will more fully appear fromthe accompanying description and drawings and will be particularlypointed out in the appended .ClttilIIlS-v The drawings show so much of'arotatable spindle as is necessary to a disclosure of the presentinvention.

In the drawings, F g

. Figure ,1 is a side elevat-ionof a rotatable spindle provided with apreferred embodiment of the present .inyention, some of the parts beingbroken away to show a portion of the construction and the lower end of,a bobbin being shown in vertical cross section mounted thereon;

a .Fig. 2 is a View similar to Fig. 1 with a portionof the constructionshownin vertical cross section. and with the bobbin removed showing'theparts in the position assiuned when the spindle is running bare;

Fig. 3 is a view inhorizontal cross taken on the line aa -wof Fig. 1; e

Fi 4 is a view: in vertical cross section of a detail of. the.construction shown inv Fig. 2 with the parts muchenlarged.

The'g'eneralconstruction is of a familiar type including the verticalspindle 1 .projecting upwardly from, and concentrically secured in, thebobbin rest 2. The usual whirl 3 afi'ords the means from which" thesection entire device is given the necessary rotation.

The lower end of a bobbin 1 of usual type is shown in cross section inFig. 1. This bobbin is provided with a verticalbore fitting over thespindle 1 and at its lower end thisbore is enlarged at 5 to fit over anden gage the bobbin clutching means by which the bobbin is held fast to,and-concentrically with, the spindle thus securing its rotation with thespindle.

A plurality of bobbin-clutching members 6, herein shown as three innumber, are mounted upon the spindle'and bobbin rest and rotatebodily-therewith. The exterior surface of these bobbin-clutching"members is generally cylindrical and conforms to the inner surfaceof'theportion 5 of'thebore of the bobbin, the extreme upper ends 7 ofthe bobbin-clutching members being curved inwardly to permit the bobbinreadily to be slid thereover.

In the construction illustrated as embodying the preferred form of thisinvention these bobbin-clutching members at their lower ends areprovided with radially projecting flanges or .feet 8. The inner loweredge is chamfered off at 9more readily to permit thedesired rockingmovement ofthe clutching members. Onthe upper surface of the feet S'anannular groove 10 is provided.

The bobbin rest 2 is provided'with a vertical recess 11 thereinextending concentric with the spindle 1 and down below the surface 12upon which the'butt of the bobbin is seated when in place. On theinterior vertical wall 13 of this recess an annular groove 14 is formed.The bobbin-clutching members are assembled with their lower ends locatedinthe recess l'la'nd'then an expansible split ring 15 is forceddownwardly until it snaps into the groove 14 and fits over the groove 10in the upper surface of the feet 8.

The bobbing-clutchin members'are given a positive radialexpan ingmovement 'by a means located between the spindle and the said memberswhich is 'yieldingly actuated vertically to effect in cooperationwith'the said members the required expansion there of. For this purposethe bobbin-clutching members "are shown as'provided upon their interiorsurfaces with'ani annular cam surface 16 and a sleeve 17 is mounted toslide vertically on the spindle 1 and has a complemental cam surface 18cooperating with the camsurface 16. This sleeve 17is yieldingly pressedverticallyupward'by'a helical spring 19 surrounding the spindle '1 andlosated-between the sleeve 17 and an integral annular sleeve-likeportion 20 oft'hebobbin rest 2.

It will thus be seen that the "action of the 'yieldingly andveraeauyupwardly-mo acted sleeve 17 in cooperation with thebobbinclutching members is to givea symmetrical radial outward movementof the bobbinclutching members.

This radial movement of the bobbinclutching members is limited byradially interengageable means on the spindle and on the said membersnear the upper ends of the latter. These means are shown as a collar 21secured to the spindle and providedrwith a downwardly projecting annular'fl'angev22 cooperating with a compl'emental vertically upwardlyprojecting annular-fiange 23 on the interior of the bobbin-clutchingmembers. The interengagement radially vof the flanges 22 and 23 limitsthe radial movement of the bobbin-clutching members.

The action of the 'ineansgemployed for expanding the bobbin-clutchingmembers, if not prevented, is such that it necessarily; has a strongtendency to elevate bodily the bobbin-clutching members and bring abouta vertical engagement of the bobbin-clutching members and the flange ofthe collar 21. The result is that so much wear takes place between thecollar 21 and the bobbin-clutching -members by reason of this verticalengagement that the flange 22 is worn off or cut into or the flangeportion of'the bobbinclutchin' members is worn off or cutinto or bothsufliciently to permit the lower ends of the bobbin-clutching members tocome out of the'recess in the bobbin rest'thus permitting thebobbin-clutchingmembers to fall out of place. This action is, however,prevented by thisinvention in the construction already described becauseany vertical movement of the bobbin-cliitching members is'prevented' bythe ring 15.

The construction, however, permits the necessary radial movement of thebobbinclutchin'g members because they may pivot freely about the ring15.

The bobbin-clutching members are held in proper spaced relation aboutthe spindle by suitable separator pins 2 1 vertically mounted in thebobbin rest.'

The construction thus provided is simple, efficient and readilymanufactured and'assembled, the radially projecting grooved feet of "thebobbin-clutching members "are readily made by machine operations and theparts are readily assembled by simply snapping the'rin'g 15 into place.In addition if it is desired to remove any of the bobbinclu'tc'hingmembers for repair or replacemerit the ring 15 may be sprung out of itsseat in the recess '11 thus permitting the bobbin-clutching members tobe removed.

Having fully described my invention, what I'claim as new and desire tosecure'by Letters Patent is:

1. The combination of a rotatable bobbin spindle'and'bobbin rest, aplurality of cen trifugally-acting, bobbin clutcliing members mountedupon and bodily rotatable therewith, radially interengageable means onsaid spindle and on said members to restrict the radial movement of saidmembers, vertically acting means to effect in cooperation with saidmembers the expansion thereof, and means carried by the bobbin restengaging the lower ends of said members and acting to prevent saidmembers from moving vertically and thereby prevent vertical engagementof said radially interengageable means and acting to permit the requiredradial movement of said members.

2. The combination of a rotatable bobbin spindle and bobbin rest, thesaid bobbin rest having a vertical recess therein concentric with aidspindle, ..a plurality of centrifugallyacting bobbin-clutching membersmounted upon and bodily rotatable therewith and provided with radiallyprojecting feet at their lower ends located in said recess, radiallyinterengageable means on said spindle and on said members near the upperends thereof to restrict the radial movement of said upper ends, meanslocated between said spindle and said members and yieldingly actuatedvertically to efiect in cooperation with said members the expansionthereof, and an expansible ring engaging the outer vertical wall of saidrecess and over lying said feet and acting to prevent said members frommoving vertically thus to prevent vertical engagement of said radiallyintereng'ageable means and acting to permit the required radial movementof said members.

4. The combination of a rotatable bobbin I spindle and bobbin resthaving a vertical recess therein concentric with said spindle, aplurality of centrifugally acting bobbinclutching' members mounted uponand bodily rotatable therewith and provided with radially projectingfeet at their lower ends located in said recess, and an expansible ringengaging the outer vertical wall of said recess and overlying said feet.

5. The combination of elements as set forth in claim 4 in which the feetof the said bobbin-clutching members are provided with an annular grooveon the upper surface thereof fitting beneath said ring.

6. The combination of elements as set forth in claim l in which theouter vertical wall of said recess is provided with an annular groove inwhich the said ring is seated.

7. The combination of elements as set forth in claim 4 in which the feetof said clutching members are provided with an annular groove on theupper surface thereof fitting beneath said ring and in which the outervertical wall of said recess is provided with an annular groove in whichthe said ring is seated.

In testimony whereof, I have signed my name to this specification.

CHARLES E. NUTTING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

